MPG to AIFF Converter

Extract MPG Audio to AIF: What This Tutorial Covers

This walk-through is for anyone holding an .mpg (or .mpeg) video who needs the soundtrack on its own as an .aif file — typically to drop into Logic Pro, an older Apple authoring tool, or a sampler that expects Apple's AIFF format. Two things are worth knowing before you start: this conversion keeps the audio and discards the video, and because the audio inside an MPG is almost always lossy, the AIF will end up larger than the source audio without sounding any better. The sections below explain why, then get you a clean AIF.

How to Convert MPG to AIF

1. Upload Your MPG File: Drag and drop your .mpg or .mpeg onto the page, or click "+ Add Files" to browse. Queue several clips and they convert in one batch with the same settings.
2. Set the Audio Sample Rate: Open Advanced Options and leave Audio Sample Rate on "Original" for a true 1:1 transfer of the source audio, or pick a specific rate only if a target device or sampler requires one.
3. Set the Audio Channel or Trim (Optional): Leave Audio Channel on "Original" to keep the source layout, or force Mono/Stereo. Set Trim (default "Unchanged") to export only a start-and-duration window instead of the whole track.
4. Convert and Download: Click "Convert" and download your AIF file. No sign-up, no watermark.

Walk-through: .aif Is AIFF, and the Video Goes Away

First, the naming: .aif and .aiff are the same format — Audio Interchange File Format, created by Apple in 1988. The three-letter .aif is just the older DOS/Windows 8.3 spelling; there is no separate "AIF" format and no quality difference between the two extensions. So when you ask for .aif, you are getting a standard AIFF file.

An .mpg file is an MPEG-1 (or sometimes MPEG-2) program stream — the format standardized as ISO/IEC 11172 and published in 1993, used by Video CD, DVD rips, and old TV captures. It multiplexes a video stream with an audio stream. This converter reads the audio stream, decodes it to raw samples, and wraps those samples in an AIFF file as uncompressed PCM, 16-bit, big-endian. The picture is not in the output at all — if you wanted to keep the video, this is the wrong tool.

The audio inside an MPG is almost always MP2 (MPEG-1 Audio Layer II), the lossy codec that ships as the standard soundtrack of Video CD, usually encoded somewhere around 192-256 kbps. Because MP2 is lossy, it permanently dropped some detail when the MPG was first encoded:

• Decoding MP2 to uncompressed PCM cannot put that detail back. The AIF sounds identical to the audio your player already produces from the MPG; it just stores every sample in full instead of in a compressed stream.
• So the AIF is much larger than the MPG's audio, not better. You are paying bytes for a container change, not buying fidelity. CD-quality stereo PCM runs about 10 MB per minute, so a compact MP2 soundtrack commonly expands several-fold.

The conversion never makes the audio worse than it already was — it just can't make lossy audio better.

MPG Audio vs AIF Output at a Glance

Common Errors and How to Fix Them

• "My AIF is huge compared to the MPG's audio" — Expected. The MPG's soundtrack was lossy MP2; the AIF writes uncompressed PCM, which is several times larger. The extra bytes are raw data, not added quality. If you want a small file, use MPG to MP3 instead.
• "The AIF won't play in my media player" — Some Windows players and browsers handle AIFF poorly. It plays natively on macOS, in QuickTime, Logic, and most pro DAWs; elsewhere, VLC opens it. If you need the most universally accepted uncompressed format, MPG to WAV is the safer pick.
• "The output is silent or empty" — Some MPG files are video-only with no audio stream, or carry a track that won't decode. Confirm the MPG actually plays sound first; if it does, re-run the conversion.
• "I only need part of the soundtrack" — Set Trim before converting to export just a start-and-duration window rather than cutting the AIF afterward.
• "The pitch or speed sounds off" — This usually means a sample-rate mismatch downstream. Leave Audio Sample Rate on "Original" unless your target tool specifically needs a fixed rate like 44100 or 48000 Hz.

When This Doesn't Work

This tool needs a real, playable MPG with a decodable audio stream — it can't read a corrupted file, and it never recovers fidelity that the lossy MP2 codec discarded earlier. It also can't keep the video; the output is audio only. If AIFF isn't actually what you need, two targets are usually better: most people who want a small, universally playable audio file should use MPG to MP3, and anyone editing on a Windows or Linux system will find MPG to WAV — the standard uncompressed PCM format on those platforms — more widely supported than AIFF.

Frequently Asked Questions

Is an .aif file different from an .aiff file?

No — they are the same format. Both are Apple's Audio Interchange File Format, created in 1988. The .aif spelling is the older three-letter DOS/Windows form and .aiff is the four-letter form; the bytes inside are identical and any tool that opens one opens the other. This converter writes a standard AIFF file regardless of which extension you asked for.

Does converting MPG to AIF keep the video?

No. This is an audio-extraction tool: it reads the audio stream out of the MPG, writes it to an AIF (AIFF) file, and discards the video entirely. The output has no picture. If you want to keep the video and only change the container or codec, you need a video-to-video conversion, not this one.

Will the AIF sound better than the audio in my MPG?

No. An MPG's soundtrack is almost always MP2 (MPEG-1 Audio Layer II), a lossy codec that permanently dropped some detail when the file was first encoded. Decoding that MP2 to uncompressed PCM and wrapping it in AIFF stores the samples your player already produces — it can't reconstruct what was removed. The AIF sounds the same as the MPG's audio, just in a larger, uncompressed container.

Why is the AIF file so much larger than my MPG's audio?

Because the AIF here is uncompressed. MP2 inside an MPG typically runs 192-256 kbps; the AIF writes every sample out in full at 16-bit, which is equivalent to roughly 1411 kbps for CD-quality stereo. CD-quality stereo PCM runs about 10 MB per minute, so a compact compressed soundtrack commonly expands several-fold. The added bytes are uncompressed data, not extra fidelity. In our testing, a one-minute MPG with a 224 kbps MP2 track produced an AIF of roughly 10 MB — far larger than the source audio, exactly because it is uncompressed.

Should I pick AIF or WAV for MPG audio?

Both are uncompressed PCM and sound identical at the same sample rate and bit depth — the difference is byte order and ecosystem. AIFF is big-endian and is the traditional choice on macOS and in Apple-centric studios; WAV is little-endian and is the universal default on Windows and Linux. If you work in Logic Pro or hand files to Mac users, AIF is fine; if you need the most broadly compatible target, MPG to WAV is the safer pick. For a small, everyday file rather than an uncompressed one, MPG to MP3 is better.

How are my files handled, and how long do you keep them?

Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically a few hours after conversion — no sign-up, no watermark, never shared or made public.